No, there are several ways to become PVP enabled. Yes, you can attack certain npc's like city guards and vendors etc, basically any PVP enabled npc. Then you can attack PVP enabled players, but you can't attack non-pvp enabled players except in duels. Lastly you can become PVP enabled by typing "/pvp".Originally Posted by dkmech
Virtually all players have a massive advantage on PVE over PVP enabled players as they don't know if and/or when you will strike. As a rogue you don't even have to become stealthed, just walk up behind them and they won't be able to stop you, unless you're PVP enabled, no-one would let a rogue stand behind them!